Electric fan



FIG. 1 is a front plan of my new, original and ornamental design;

FIG. 2 is an enlarged top plan view thereof;

FIG. 3 is a left side plan view thereof;

FIG. 4 is a right side plan view thereof;

FIG. 5 is a perspective view thereof; and,

FIG. 6 is a rear plan view thereof, the bottom view being omitted as it forms no part of the present invention. 

The ornamental design for an electric fan, as shown and described. 